Komakichi Matsuoka

was a Japanese politician and labor activist. Born in Iwami Province (present day Tottori Prefecture), Matsuoka was a steelworker at Japan Steel Works who joined Suzuki Bunji as a business agent at the predecessor to the Japanese Federation of Labour in 1917.

With a growing interest in politics, Matsuoka joined the pro-labour Social Democratic Party in 1926, and ran independently in the 1942 Japanese general election in a failed bid to join Japan's House of Representatives following the labour movement's eventual break up in 1940 due to an inability to organize and need to comply with the demands of Japan's imperialist expansionism in the 1930s.